Atrioventricular nodal reentrant tachycardia (AVNRT) is a common paroxysmal supraventricular tachycardia (SVT) featuring repetitive salvos with spontaneous termination. Few reports exist demonstrating incessant AVNRT with chronically uncontrolled ventricular rates and tachycardia-induced cardiomyopathy (TIC).1,2 Persistent cases of incessant AVNRT resulting in TIC and intracavitary thrombus are exceedingly rare.2 We report a case of incessant slow/fast AVNRT associated with TIC and catastrophic embolization of left ventricular (LV) thrombus treated with acute radiofrequency slow pathway modification.
